Method and apparatus for aligning display substrate by rubbing, method and system for preparing display substrate

Abstract

This disclosure pertains to the technical field of display, and particularly to a method and an apparatus for aligning a display substrate by rubbing as well as a method and a system for preparing a display substrate. This method for aligning a display substrate by rubbing comprises: aligning the surface of the display substrate using a rubbing cloth in a rubbing process; and treating impurity particles produced in the rubbing process after the rubbing process, wherein the charges of the impurity particles are converted or eliminated to eliminate the electrostatic adsorbing effect between the impurity particles and the display substrate so as to remove the impurity particles produced in the rubbing process. Accordingly, an apparatus for aligning a display substrate by rubbing is further provided. This method and apparatus for aligning a display substrate by rubbing are capable of removing the strong “electrostatic adsorbing effect” between a display substrate and impurity particles so as to completely remove foreign matters in cooperation with ultrasonic oscillation or the action of washing and beating by water outside.

What is claimed is: 
     
         1 . A method for aligning a display substrate by rubbing, comprising:
 aligning the surface of the display substrate using a rubbing cloth in a rubbing process; and   treating impurity particles produced in the rubbing process after the rubbing process, wherein charges of the impurity particles are converted or eliminated to eliminate an electrostatic adsorbing effect between the impurity particles and the display substrate so as to remove the impurity particles produced in the rubbing process.   
     
     
         2 . The method for aligning a display substrate by rubbing according to  claim 1 , wherein the step of converting or eliminating charges of the impurity particles comprises:
 converting or eliminating an electric property of the impurity particles produced in the rubbing process by using ions having charges with a single electric property, wherein an electric property of the charges of the ions is the same as the electric property of the charges of the impurity particles, and is opposite to an electric property of a voltage of the display substrate produced by rubbing.   
     
     
         3 . The method for aligning a display substrate by rubbing according to  claim 2 , wherein the method further comprises enhancing removal of the impurity particles by using auxiliary ions having an electric property of charges opposite to that of the ions having charges with a single electric property. 
     
     
         4 . The method for aligning a display substrate by rubbing according to  claim 2 , wherein in the step of treating and removing the impurity particles, the method further comprises removing the impurity particles by using an ultrasonic oscillation process. 
     
     
         5 . The method for aligning a display substrate by rubbing according to  claim 4 , wherein after the ultrasonic oscillation process, the method further comprises a step of removing the impurity particles by using a solvent cleaning method. 
     
     
         6 . The method for aligning a display substrate by rubbing according to  claim 1 , wherein in the rubbing process, the method further comprises reducing a voltage produced by the rubbing between the impurity particles and the display substrate, by using an X-Ray electrostatic elimination method. 
     
     
         7 . The method for aligning a display substrate by rubbing according to  claim 1 , wherein before the rubbing process, the method further comprises pre-removing environmental foreign matters on the display substrate by using an ultrasonic oscillation process. 
     
     
         8 . A method for preparing a display substrate, comprising the method for aligning a display substrate by rubbing according to  claim 1 . 
     
     
         9 . An apparatus for aligning a display substrate by rubbing, comprising:
 a rubbing unit for aligning the surface of the display substrate using a rubbing cloth in a rubbing process; and   an impurity particle treatment unit for producing ions and allowing interaction between the ions and impurity particles produced in the rubbing process, such that charges of the impurity particles are converted or eliminated to eliminate an electrostatic adsorbing effect between the impurity particles and the display substrate and remove the impurity particles produced in the rubbing process.   
     
     
         10 . The apparatus for aligning a display substrate by rubbing according to  claim 9 , wherein the impurity particle treatment unit comprises:
 an ion production portion for producing the ions having an electric property of charges which is the same as an electric property of charges of the impurity particles and is opposite to an electric property of a voltage of the display substrate produced by rubbing; and   an ion output portion for allowing the action between the ions and the impurity particles to convert or eliminate the charges of the impurity particles so as to remove the impurity particles produced in the rubbing process.   
     
     
         11 . The apparatus for aligning a display substrate by rubbing according to  claim 10 , wherein the impurity particle treatment unit further comprises an ultrasonic oscillation portion which comprises an ultrasonic oscillation chamber, and the ion output portion comprises an ion outputter which outputs the ions having charges with a single electric property to the ultrasonic oscillation chamber, wherein the electric property of charges of the ions is the same as the electric property of charges of the impurity particles, and is opposite to the electric property of the display substrate. 
     
     
         12 . The apparatus for aligning a display substrate by rubbing according to  claim 11 , wherein the ion output portion further comprises an auxiliary ion outputter and the ultrasonic oscillation portion further comprises an auxiliary ultrasonic oscillation chamber, wherein the auxiliary ion outputter outputs auxiliary ions to the auxiliary ultrasonic oscillation outputter, and an electric property of charges of the auxiliary ions is opposite to that of the ions having charges with a single electric property. 
     
     
         13 . The apparatus for aligning a display substrate by rubbing according to  claim 11 , wherein the impurity particle treatment unit further comprises a solvent cleaning portion which is provided after the ultrasonic oscillation portion. 
     
     
         14 . The apparatus for aligning a display substrate by rubbing according to  claim 9 , wherein the rubbing unit further comprises an X-Ray electrostatic eliminator configured for reducing the voltage produced by the rubbing between the impurity particles and the display substrate during the rubbing process. 
     
     
         15 . The apparatus for aligning a display substrate by rubbing according to  claim 9 , further comprising a pre-cleaning unit as an ultrasonic pre-cleaning portion, which is provided before the rubbing unit and is operable for removing environmental foreign matters on the display substrate. 
     
     
         16 . A system for preparing a display substrate, comprising the apparatus for aligning a display substrate by rubbing according to  claim 9 .